gistfile1.txt

input
1 - 2
1 - 3
2 - 3
2 - 4
3 - 1
3 - 2
4 - 1
4 - 2

sort:
1 - 2
1 - 3
2 - 3
2 - 4
1 - 3
2 - 3 
1 - 4
2 - 4

prob
1-4
2-4

required
1 - 3
2 - 3
3 - 2
4 - 2

pairs.js

let data = {
  links: [{
    from: 1,
    to: 2,
  }, {
    from: 1,
    to: 3,
  }, {
    from: 2,
    to: 3,
  }, {
    from: 2,
    to: 4,
  },
  {
    from: 3,
    to: 1,
  }, {
    from: 3,
    to: 2,
  }, {
    from: 4,
    to: 1,
  }, {
    from: 4,
    to: 2,
  }
  ]
}  
var keyVals = [];
var influencers = [];
for (let index = 0; index < data.links.length; index++) {
  const element = data.links[index];
  var pairs = [];
  pairs.push(element.from, element.to);
  pairs.sort((a, b) => a - b);

  keyVals.push({ id: pairs[0], value: pairs[1] });
}
keyVals.sort((a, b) => a.id - b.id);
console.log(keyVals);

for (let index = 0; index < keyVals.length; index++) {
  if (!influencers.find((influencer) => influencer.id === keyVals[index].id)) {
    influencers.push({ id: keyVals[index].id, count: 1 });
  } else {
    influencers.find(
      (influencer) => influencer.id === keyVals[index].id
    ).count += 1;
  }
}
console.log(influencers);

question.txt

Implement a function that returns an object showing how many unique connections each user has.